package com.wu.d2;

public class Test2 {
    public static void main(String[] args) {
        provide_info(constant.boy);
    }
    public static void provide_info(constant sex) {
        switch (sex){
            case boy:
                System.out.println("boy");
                break;
                case girl:
                    System.out.println("girl");
                    break;
        }
    }
}
